23. Symbol for Standard Threads Intro British* Thread symbol Kinds of thread Related Standard SP UNS Unified special series BS 1580 B.S.W. British Standard Whitworth coarse threads BS 84 B.S.F. British Standard fine threads BS 84 BSP British Standard pipe thread (corresponding to R, Re, Rp of ISO) BS 21, 2779 SL B.A. B.A.-Screw threads BS 93 Acme General purpose, Acme screw threads BS 1104 Buttress Buttress threads BS 1657 BSC Cycle threads BS 811 PO BSMO Microscope objective threads BS 3569 E Edison screw threads BS 5042 * We left out the symbols after ISO standard was adopted. ST German* Thread symbol Kinds of thread Related Standard GL Glass containers thread DIN 168 ROLL S Buttress thread DIN 513,2781,20401 Rd Knuckle thread DIN 262,3182, 7273, 15403,20400 W Whitworth-gewinde DIN 168,477,6630,49301 KS,KT Screw siles for packages made of Plastics DIN 6063 CARBIDE E Edison screw thread DIN 40400 Pg Steel conduit thread DIN 40430 Vg Automobil tire valve thread DIN 7756 Gf Thread for freezing pipes DIN 4930 LONG Gg Threads for drill pipe DIN 4941,20314 HA Thread for bone screws and nuts DIN 58810 FG Bicycle threads DIN 79012 * We left out the symbols after ISO standard was adopted. HAND TAPS EG (STI) SPECIAL THREADS, GAUGES THREAD MILLS DIES CENTER DRILLS Technical info 715